JPH11319650A - Changeover jetting valve switchable of jetting quantity between small and large - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inexpensively provide the changeover jetting valve freely switchable between small quantity jetting and large quantity jetting in accordance with application. SOLUTION: In the changeover jetting valve, a vertical groove large in cross- section area is provided at a valve stem 1, and a vertical groove small in cross- section area is connected thereunder, and an O-ring 4 is set at a bottom of an upper open part of a valve housing 12, and a coil spring 6 is used in order to push up the valve stem 1, and in order to changeover from a closed state at a standstill time to the small quantity jetting, the valve stem 1 is slightly pushed down so that a position of the O-ring 4 comes to the region of the vertical groove 3 small in cross-section area being a flow passage groove of small quantity jetting liq., and in order to changeover to the large quantity jetting, the valve stem 1 is moreover pushed down so that the position of the O-ring 4 comes to the region of the vertical groove 2 large in cross-section area being the flow passage groove of large quantity jetting liq., to changeover the jetting quantity between small and large.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection valve used for an aerosol container, and more particularly to a switching injection valve capable of switching the injection amount between a small amount and a large amount.

[0002]

2. Description of the Related Art It is very convenient if a single aerosol container can freely and easily switch between a small amount injection and a large amount injection. Depending on the application, there may be times when you want to maintain a small amount of injection, and sometimes you want to maintain a large amount of injection.
Further, there is a case where it is desired to freely switch between the small amount injection and the large amount injection. Both hair spray and pesticide spray are important. Moreover, it is easy to use,
In addition, it is desirable that it be inexpensive. However, a switching injection valve satisfying such a condition has not yet been developed.

[0003]

SUMMARY OF THE INVENTION Accordingly, it is a first object of the present invention to provide a switching injection valve which can freely and easily switch between a small injection and a large injection according to the application.
Subject. The structure is more complicated than the conventional injection valve by forming a large amount of injection liquid flow path groove and a small amount of injection liquid flow path groove in the axial direction of the valve stem and combining them with an O-ring. It is a second object of the present invention to avoid such a situation and to provide an inexpensive product. In addition, the filling gas is filled into the aerosol container by arranging the filling lateral hole on the circumferential side surface at the intermediate position of the valve housing and by fitting the elastic cylindrical body so as to close the lateral hole. Obtaining this is a third object of the present invention.

[0004]

According to the present invention, a vertical groove 2 having a large cross-sectional area is provided in a valve stem 1, a vertical groove 3 having a small cross-sectional area is continuously provided thereunder, and an O-ring 4 is provided therearound. And the O-ring is fitted into the bottom of the upper opening of the valve housing, and the upper end of the coil spring 6 for urging the valve stem upward is pressed against the lower side of the flange 10 provided at an intermediate position of the valve stem. Closes a lateral hole 8 provided in the valve stem 1 above the flange with a stem rubber, positions the stem rubber on the upper surface of the valve housing 12 like a lid, and positions a mountain cap on the upper surface. In order to support the valve housing with the cylindrical portion 15 and to reduce the injection amount to a small amount, the valve stem is slightly depressed, and the position of the O-ring 4 is a cross-sectional area where the small amount of the injection liquid flow channel is formed. In order to be in the region of the small vertical groove 3 and to switch to the large-volume injection, the valve stem is further depressed, and the position of the O-ring 4 is set to the large-groove 2 Is a switching injection valve capable of switching the injection amount to be in the range of a small amount and a large amount.

[0005]

Since the present invention is constructed as described above, when the push button is lightly pressed against the coil spring 6 from the closed state at rest in FIG. 1, the valve stem 1 descends and is closed by the stem rubber 9 until then. Is released, and at the same time, O
The position of the ring 4 is a small amount of liquid jet flow channel groove 3 having a small cross-sectional area.
(FIG. 2). At this time, a small through-hole having a V-shaped cross section is formed between the valve stem 1 and the O-ring 4 fitted around the valve stem 1, and the small through-hole passes through the small-volume jet flow channel 3 and enters the inlet of the valve housing. 19, the horizontal hole 8 communicates with the vertical hole 16 of the valve stem 1, and a small amount of the liquid in the aerosol container is jetted from the nozzle. When the push button is further pressed down against the coil spring 6, the valve stem 1 is further lowered, and the position of the O-ring 4 comes to the area of the large-volume jet flow channel 2 having a large cross-sectional area (FIG. 3). At this time, a large through hole having a substantially rectangular cross section is formed between the valve stem 1 and the O-ring 4 fitted around the valve stem 1. 19, through the supply pipe 18,
On the other hand, since the horizontal hole 8 communicates with the vertical hole 16 of the valve stem 1 as in the case of the small amount injection, a large amount of the liquid in the aerosol container is injected from the injection hole. Even in a state where the coil spring 6 is compressed to the maximum, the position of the O-ring 4 is still in the area of the large amount of the injection liquid flow channel 2. If the push button is kept lightly pressed, the small amount of injection can be continued. Conversely, if the push button is kept pressed to the maximum compression state of the coil spring 6, the large amount of injection can be continued. When the pressing of the push button is released, the valve stem 1 is pressed against the lower surface of the flange of the valve stem, and is pushed up by the elastic force of the coil spring 6 interposed between the valve stem and the valve stem, and returns to the original stationary state. Thus, by simply pressing the push button with a finger, the valve stem can be moved up and down, and the large-volume liquid passage groove and the small-volume liquid passage groove can be operated linearly in the vertical direction. Therefore, the injection amount can be switched between the small amount injection and the large amount injection. At the time of filling the pressurized fluid, a filling device is connected to the upper end of the valve stem 1 to perform the filling. As in the case of the injection, the valve stem 1 is pushed down to open the lateral hole 8, and the elastic cylindrical body until that time. 5 of the valve housing closed at 5
Is opened by the pressure of the pressurized fluid, and the container is filled with the pressurized fluid.

[0006]

FIG. 1, FIG. 2 and FIG. 3 are longitudinal sectional views of a switching injection valve according to the present invention, which can switch the injection amount between a small amount and a large amount. Shown in a small injection state and a large injection state. FIGS. 4, 5, 6, and 7 show a valve stem 1 which is a main part of the present invention, and particularly, is intended to show a small-quantity jet flow channel and a large-quantity jet flow channel. 4, 5, 6, and 7, the valve stem 1
A vertical groove 2 having a large cross-sectional area is provided on the lower side, and a vertical groove 3 having a small cross-sectional area is continuously provided thereunder. An oblique transition portion is formed at a connecting position between the vertical grooves 2 and the vertical groove 3 to form a valve stem 1. The vertical groove 3 side is made smaller in diameter than the vertical groove 2 side so that the valve stem 1 moves up and down smoothly. An O-ring 4 is fitted around the valve stem 1 and the O-ring is fitted into the bottom of the upper opening of the valve housing. The upper end of the coil spring 6 is pressed against the lower side of the flange 10 provided at an intermediate position of the valve stem, the lower end thereof is brought into contact with the spring seat 7, and the valve stem is urged upward by its resilient force. Normally, a lateral hole 8 provided in the valve stem 1 above the flange is closed with a stem rubber 9,
The stem rubber 9 is placed in a lid shape on the upper surface of the valve housing 12, and the mountain cap is positioned on the upper surface. The valve housing is supported and fixed by the tightening cylinder 15 of the mountain cap. In order to make a small amount of injection from the closed state at the time of rest in FIG. To switch to high-volume injection, push down the valve stem further and
This is a switching injection valve configured so that the position of the ring 4 is located in the area of the vertical groove 2 having a large cross-sectional area, which is a large amount of injection liquid flow channel, and can switch the injection amount between a small amount and a large amount. A rigid pipe is used for the liquid supply pipe connected to the lower end of the valve housing. In this switching injection valve, a filling lateral hole 14 communicating between the inside and the outside is located on a circumferential side surface at an intermediate position of the valve housing 12 so as to enable filling, and the elastic cylindrical body 5 is closed so as to close the lateral hole. The pressurized gas is press-fitted from the upper end of the valve stem 1 at the time of filling the pressurized gas.
It can be filled into aerosol containers.

[0007]

The valve stem 1 is provided with a vertical groove 2 having a large cross-sectional area, and a vertical groove 3 having a small cross-sectional area is continuously provided thereunder. An O-ring 4 is fitted around the valve stem 1. And the longitudinal groove 2 having a large cross-sectional area, the longitudinal groove 3 having a small
Since it is a switching injection valve that can switch between a small amount and a large amount only by the relationship with the ring 4, to use a small amount of injection from a closed state at rest, it is only necessary to push down the valve stem a little, and to use a large amount of injection. To switch, it is only necessary to depress the valve stem further. Therefore, there is an effect that a single aerosol container can freely and easily switch between a small amount injection and a large amount injection according to the application. The valve stem 1 has a longitudinal groove 2 having a large cross-sectional area.
And a vertical groove 3 having a small cross-sectional area.
The structure is made by fitting the O-ring 4 around the periphery of the injection valve, so that the structure is not complicated as compared with the conventional injection valve, and there is an effect of making the product inexpensive. Further, since the filling horizontal hole is located on the circumferential side surface at the intermediate position of the valve housing and the elastic cylindrical body is fitted so as to close the horizontal hole, the pressurized gas can be filled in the aerosol container. effective.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a switching injection valve of the present invention shown in a normally closed state.

FIG. 2 is a longitudinal sectional view of the switching injection valve of the present invention shown in a small injection state.

FIG. 3 is a longitudinal sectional view of the switching injection valve of the present invention shown in a large injection state.

FIG. 4 is a front view of a valve stem which is a main part of the switching injection valve of the present invention.

FIG. 5 is a vertical cross-sectional view of a switching injection valve according to the present invention, taken along a small- and large-quantity injection liquid flow channel of a valve stem constituting a main part of the switching injection valve.

FIG. 6 is a cross-sectional view of the valve stem of the switching injection valve according to the present invention in a region of a large amount of injection liquid flow channel;

FIG. 7 is a cross-sectional view of the valve stem of the switching injection valve of the present invention in the region of the small-quantity injection liquid flow channel.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 valve stem 2 large amount of injection liquid flow groove 3 small amount of injection liquid flow groove 4 O-ring 5 cylindrical body 6 coil spring 7 spring seat 8 side hole of valve stem 9 stem rubber 10 flange provided on valve stem 11 mountain cap 12 valve housing DESCRIPTION OF SYMBOLS 13 Packing 14 Filling horizontal hole 15 Tightening cylinder part of mountain cap 16 Vertical hole of valve stem 17 Cylindrical body fitting groove 18 Hard liquid supply pipe 19 Inflow hole of valve housing

Claims (3)

[Claims] A longitudinal groove having a large cross-sectional area is provided in a valve stem.
Is provided, and a vertical groove 3 having a small cross-sectional area is continuously provided thereunder,
An O-ring 4 is fitted around the periphery, the O-ring is fitted into the bottom of the upper opening of the valve housing, and the upper end of the coil spring 6 for urging the valve stem upward is located below the flange 10 provided at an intermediate position of the valve stem. Side, and normally, a lateral hole 8 provided in the valve stem 1 above the flange is closed with a stem rubber, the stem rubber is placed in a lid shape on the upper surface of the valve housing 12, and a mountain cap is located on the upper surface. Zuke, mountain cap tube 1
In order to support the valve housing at 5 and reduce the injection amount to a small amount, the valve stem is slightly depressed, and the position of the O-ring 4 is changed to the vertical groove 3 having a small cross-sectional area which is a small amount of the injection liquid flow channel. In order to switch to the large-volume injection, the valve stem is further depressed, and the position of the O-ring 4 is changed to the vertical groove 2 having a large cross-sectional area which is the large-volume liquid passage groove.
A switching injection valve capable of switching the injection amount to be in a range of a small amount and a large amount. 2. The switching injection valve according to claim 1, wherein the liquid supply pipe connected to the lower end of the valve housing is a hard pipe. 3. A structure in which a filling lateral hole communicating between the inside and outside is located on a circumferential side surface at an intermediate position of the valve housing, and an elastic cylindrical body is fitted so as to close the lateral hole. 2. The switching injection valve according to claim 1, wherein, when filling the gas, pressurized gas can be injected into the aerosol container by pressurizing a pressurized gas from an upper end portion of the valve stem.